<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, user-scalable=no">
    <title>Title</title>
    <script src="jquery-3.2.1.js"></script>

    <style>
        .container{
            width: 300px;
            margin: 0 auto;
        }
        .title{
            font-size: 20px;
            color: indianred;
        }
        .result{
            display: none;
        }
    </style>

</head>
<body>

<div class="container">
    <p class="title"></p>
    <p class="result"></p>
</div>

<script src="app.js"></script>
</body>
</html>